389 



bored, in wliieli the indicatoi- and n iliennoelement were placed. 

 This furnace was available till 900°. The temperature of the fnrnace 

 was measured by a Heraeus platinum-rhodium thermoelement, which 

 was carefully adjusted before the experiment. 



The Measurement of the Vapour Pressure. 



The method of the pressure measurement by an indicator is exactly 

 the same as that applied by Prof. Smits and Bokhorst '). The equi- 

 TABLE I. Vapour Pressure of the Solid Phase. 



Q _ 



4.571 



= 7357 



C = 8.279 



1) loc. cit. 



